<?php
query_posts(array(‘orderby’ => ‘rand’, ‘category_name’ => ‘gallery’,’showposts’ => 1));
if (have_posts()) :
while (have_posts()) : the_post(); ?>
<a href=”<?php the_permalink(); ?>”><?php the_post_thumbnail(); ?></a><br><a href=”<?php the_permalink(); ?>”><?php the_title(); ?></a><?php the_excerpt(); ?>
<?php endwhile;
endif; ?>